Piston-replacing device.



J. F. HAUSSMANN.

PISTON REPLACING DEVICE.

APPLICATION FILED JULY 8,1916.

1,235,315. Patented July 31, 1917.

eerie PISTON-REPLACING DEVICE.

Application filed July 8, 1916.

To all whom it may concern.

Be it known that I, J OHN F. HAUSSMANN, a citizen of the United States, and resident of Milwaukee, in the county of Milwaukee and State of lVisconsin, have invented certain new and useful Improvements in Piston- Replacing Devices; and I do hereby declare that the following is a full, clear, and exact description thereof.

The present invention relates to new and useful improvements in devices for contracting the piston rings of pistons when removed from their cylinders to facilitate replacing the pistons in their respective cylinders.

Particularly in connection with the pistons of internal combustion motors wherein a plurality of expansile packing rings are employed, considerable difficulty is involved in replacing a piston in its respective cylinder, due to the necessity of successively contracting the rings to prevent their abutment against the end of the cylinder.

It is therefore the object of the present invention to provide a simple device which may be applied to a piston for contracting the packing rings thereof, to facilitate insertion of the piston in a cylinder.

It is further an object to provide such a device which may be very readily applied to a piston and which upon movement of the piston into its cylinder is moved on the piston to successively contract the packing rings thereof, and which may move past the end of the piston to permit its complete insertion in the cylinder.

With the above and other objects and advantages in view, the invention resides more particularly in the novel combination, arrangement and formation of parts more particularly hereinafter described and more particularly pointed out in the appended claims.

In the drawings Figure 1 is an elevational view of a piston, with the improved packing ring contracting I device associated therewith.

Fig. 2 is a top plan view of the piston and the improved contracting device.

Fig. 3 is a fragmentary view showing. the means for securing my improved device about a piston of relatively small diameter.

Referring now more particularly to the accompanying drawings, 5 designates a piston of the usual type employed in internal combustion motors and which. is insertihle Specification of Letters Patent.

Patented July 31, 1917.

Serial No. 108,215.

in the cylinder 6 and provided with a plurality of expansile packing rings 7 of conventional type.

The improved holding device comprises a strap 8 of leather or other flexible material which is of a length less than the circum' ference of the piston, and which is adapted to be slidably secured about the piston by means of a link 9 having one end passed through an apertured ear l0 projecting laterally from one end of the strap and secured to said ear by cotter pins 11 passed through the ring at the sides thereof. The other end of the link is slidably engageable through an apertured car 12 at the other end of the strap, the link is preferably curved to correspond to the circumferential curvature of the piston and the inner side of the link is provided with a series of ratchet teeth 13 adapted to selectively receive the edge of the ear aperture.

Secured transversely at spaced intervals on the inner face of the strap are packing rings engaging plates 14 which have their ends extended past the strap and the ends of they plates at one side of the strap are outwardly curved to provide cam portions 15 adapted to engage respective rings and exert a cam action thereon to contract the rings, these cam portions being at the lower side of the strap when the device is applied to a piston.

In operation, the strap is disposed about the upper end of a piston, as shown in Fig. 1 and is contracted by grasping the end ears 10 and 12 to thus contract the upper piston rings which it embraces, the upper ends of the plates in this position being disposed Slightly below the top of the piston. Thus upon movement of the piston intothe cylinder, the end of the cylinder will engage the plates 14 and will slide the entire device downwardly on the piston, to successively contract the lower piston rings, and finally to force the device from the piston upon completion of the movement of the piston into the cylinder.

By reason of the tooth link 9, the present device is applicable to pistons of varying diameters, and may be readily applied.

Although the series of teeth on the link 9 give a considerable degree of adjustment, for use in connection with pistons of very small diameter, however, a further adjust- Inent of the means for securing the ends of the straps together is provided which com prises an opening 15 formed in that end portion of the strap adjacent the ear l2, and adapted to receive the link whereby it may engage with an apertured ear l2 carried by the strap inwardly of the opening.

\Vhat is claimed is:

1. A piston replacing device comprising a flexible strap adapted to be secured about a piston and transverse plates on the inner face of the strap having their ends extended therepast, with the ends at one side of the strap curved to provide cam portions.

2. A'piston replacing device comprising a flexible strap, cam portions at one side of the" strap, lateral ears at the ends of the strap, a link secured to one of the ears and freely movable through the other ear, a series of teeth on the link engageable with said other ear, the strap being provided with a link receiving opening adjacent said other ear and a third apertured ear carried by the strap inwardly of the link receiving opening, the aperture of said ear being adapted to receive the li'nkwhen passed through said link receiving opening of the strap.

In testimony that I claim the foregoing I have hereunto set my hand at Milwaukee, in the county OflWllWELUkES and State of il isconsin.

JOHN F. HAUssii-Aniv,

flames effithis patentmay be obtained fot' five cents'eacnby addressing" theGommsswnr of iPatehts'} Washington, D. E. 

